Covering for cables and the like



Patented July 3, 192.8.

ALLEN D. rE'rTEE, 0E MOUNT VERNON, AND CARROLL :Ls 1 v NEW Yoax.

COVERING FOR CABLES THE LIKE.

Application filed July 2, 1927. Serial No. 203,001.

` This invention relates top improvements in coverings for cables andthe like and aims to provide an expansible `and contract1ble sheathadapted to serve as an anchorage or reinforcement forcement or othersuitable ireprooing or heat insulating material or other plasticcoating. v f

The invention will be apparent from the following specification whenread in connection with the accompanying drawings and the featuresofnovelty will be pointed out with particularity in the appended claim. Inthe drawings- Fig. 1 showsl an electric cable having a coveringembodying our invention- Fig. 2 is a similar view on a smaller scaleshowing the application of our covering to a cable having an enlargedjoint;

Fig. 3 is an enlarged d tail showin our improved expansible andcontractible s eath and the woven arrangement of the strands thereof.

Heretofore, the application of ireproong materials to lead coveredcables and the like has always been a laborious process. Several methodsare in vogue for applyin the materia1s,'most ofthem involving a te ioushandwrapping operation. The common rope and cement .mortar combinationinvolves the spiral wrapping of la. I inch hemp or fjute rope at a 1/1inch spacing around! the cable to serve as a base and binder forthecement mortar which is plastered on to a total thickness of Fys to 2%inches. Another type of binder used with cement mortar is a wire lathprovided with clay buttons." This is wound on spirally in strips about 3inches wide. It is not only a laborious process but the ends of the lathwires form a sourceof danger to the hands of the workmen. Another commonfireprooing material is asbestos tape in various forms used either withor without a cement mortar. c A fourth method is the use of a cementmortar applied directly to the cable with a binding tape wound spirallyaround the outside. All of these prior practices involve a tedioushandwrapping operation. 1

To overcome the inelicient and time consuming hand-wrapping of cables,we provide a sheath which is so woven that it can be readily eirpandedto permit its being easily and ,freely slipped over the cable orl anjoints therein and then contracted by an end wise pull to hug thesurface ofthe cable.

v spliced Our improved sheath S is of tubular stock-f HAW, OF'J'ACKSONHEIGHTS,

ably made of asbestos rope and the intersecting ends are bound togetherwith twine as indicated at 14.

The diagonal arrangement of the strands causes the stocking-like tubularsheath S when compressed longitudinally, to expand or enlarge thediameter of the sheath and lenables it to be readily slipped over theend of the cable.

This expansible character of the sheath of particular advantage where aspliced or jointed cable is to be covered with fireproof cement.

Figure 1 shows a 'cable C a portion of which is covered with a layer ofcement or ireprooiing compound F which is\ applied over the open-worksheath S. The left part of this figure shows the sheath expanded andillustrates how part of it can be slipped outfof the way'for the purposeof making a joint or splice in the cable.

Fig. 2 illustrates a cable which has been 'spliced at the enlarged jointJ. `.The fireproofingcement F is adapted to cover the entire joint aswell as the right half. of the cable but the same has been broken awayand omitted in the drawing to show the manner 4in which the sheath VSfits snugly over the enlarged joint as well as the cable proper.

The woven sheath shown and described is of tubular or stocking-like formbut I contgmplate also using a diagonally woven flat fabric on cableswhich have. been joined or prior to the time of covering with a fireproong coat. On such work, the flat mesh fabric will be wrapped about thecable and the edges drawn together and fastened by a suitable lashingcord. Y

While the ex ansible sheath has been shown and descri ed in connectionwith the reproofi, of cables, it will be readily understood Itconnection with the. application of heat in sulation material to pipesfor `conve ing fluids, and enerally to the coating of ca les, pi es andt e like with plastic material.'

arious other modifications may be made by those skilled in the artwithout departing at the same can also be used in V from the inventionas defined in the apbedded between said strands and surroundpendedclaim. ing said sheath.-

What We claim s:- In witness whereof, We have' hereunto 10 InCombination, a lead covered cable havsigned our names. 5 Ving :montercoverngcomprisng astocknglike sheath ofoppositely inclined interwovenALLEN D. PETTEE. strands and a layer of reproof cement em- CARROLL H.SHAW.

